Services
Engineering & design
Permit packages, interconnection studies and structural calculations produced to the standard an AHJ or utility actually checks against.
Talk to our team
Engineering & Design
Permit packs, shading analytics and single-line diagrams.
Designed for your business
Installers · EPCs · Adjacent trades
Reduce AHJ rejections
Free your engineers for higher-value work
Engineering deliverables for permits and interconnection
BIM & 3D visualizations
Building information modeling and 3D renderings that catch clash conditions between racking, conduit and structural members before they show up as a field problem.
Interconnection studies
Application support and technical review for utility interconnection, the step where most project timelines actually stall, given median queue times that now run past five years in several regions.
Permit pack drafts
Complete permit packages, site plan through structural and electrical detail, built to the specific requirements of the jurisdiction reviewing them.
Shading & production analytics
Yield modeling that accounts for real shading obstructions, not a flat derate assumption, which is what keeps a production guarantee from becoming a liability.
Single-line diagrams
SLDs built to the NEC and utility standard a permit reviewer and an interconnection engineer both need to see.
Structural calculations
Stamped structural analysis for racking attachment, roof loading and foundation design, engineered to the specific site rather than a generic load table.
Where projects clear review faster
Fewer permit rejections
Drawings and calculations get built to the specific AHJ's standard from the start, instead of a generic package that comes back redlined.
Move faster through interconnection
Technical review and application support target the exact utility's process instead of a one-size interconnection filing.
Catch design conflicts before the field does
BIM and clash detection surface a structural or routing conflict on screen instead of on a ladder.
FAQs
What engineering deliverables does a typical solar project need before permitting?
Most projects need a site plan, single-line diagram, structural calculations, equipment specifications and datasheets, and often a shading and production analysis, with the exact set depending on the AHJ and project size. Larger or interconnecting projects add interconnection studies. Sunhub produces these to the standard an AHJ or utility actually checks against, which reduces permit rejections.
Does Sunhub's engineering team stamp drawings for every jurisdiction?
Stamping requires a professional engineer licensed in the state where the project is built, so coverage depends on jurisdiction rather than being automatic everywhere. Sunhub produces permit packages, single-line diagrams, and structural calculations to the standard reviewers check against and arranges the appropriate licensed stamp for the project's location. Confirm the specific state when scoping the work.
How fast can a permit package or single-line diagram turn around?
Turnaround depends on project size, complexity, and how complete the site and equipment information is at the start, so a straightforward single-line diagram moves faster than a full structural package. Sunhub's aim is to move projects through permitting and interconnection with fewer rejections, which usually beats the round-trip cost of a package that gets kicked back. Share the project scope for a firm estimate.
Explore engineering & design
BIM & 3D Visualizations
Source BIM modeling and 3D visualization for solar projects to catch clash conditions before installation. Engineering services built for field-ready designs.
Explore BIM & 3D VisualizationsInterconnection Studies
Get interconnection application support and technical review for solar projects. Engineering services built for utilities with multi-year queue backlogs.
Explore Interconnection StudiesPermit Pack Drafts
Source complete solar permit packages, site plan through structural and electrical detail, built to the specific AHJ's requirements on Sunhub.
Explore Permit Pack DraftsShading & Production Analytics
Get shading and production analytics that model real site obstructions, not a flat derate. Engineering services for accurate solar production estimates.
Explore Shading & Production AnalyticsSingle-line Diagrams (SLD)
Get single-line diagrams built to NEC and utility interconnection standards. SLD engineering services for solar permitting and interconnection on Sunhub.
Explore Single-line Diagrams (SLD)Structural Calculations
Get stamped structural calculations for racking, roof loading and foundation design. Solar structural engineering services built per site on Sunhub.
Explore Structural Calculations
